A low-cost child vaccine that can be transported and stored in the most remote villages without need for refrigeration will be out in a couple of years. Indian and British biotech scientists who started work in 2001 on a vaccine that can be stored without refrigeration, announced on Tuesday that their breakthrough will cut the cost of vaccinating a single child from $30 to roughly $10. The two firms — UK’s Cambridge Biostability Ltd (CBL) and India’s Panacea Biotec — said they are now only waiting to transport their 150 scientists who worked on the project into a new research and development (R&D) facility near Chandigarh, where human trials will begin early next year. ‘‘Most vaccines work only if stored in a temperature ranging from 2-8 degrees. We discovered that when tweaked by Panacea, CBL’s ‘stable liquid’ technology keeps vaccines potent throughout their life cycle, entirely without cold storage. This will drastically cut vaccination costs and make vaccines far more accessible to the poor,’’ said Rajesh Jain, joint-MD, Panacea Biotec. Cold-chain comfort